The difference between black silicon carbide P standard and FEPA standard
The main differences between black silicon carbide P standard and FEPA standard are as follows:
1. Particle shape
Black silicon carbide P standard: crushed by Raymond mill or ball mill, the particles are long strips or columns, the surface is rough and angular, forming a multi-faceted pyramid structure.
Black silicon carbide FEPA standard: crushed by ball mill or air flow mill, the particles are more rounded and the surface is relatively smooth.
2. Particle size standard
Black silicon carbide P standard: meets the P series standard (GB/T 9258.2-2008), with high basic particle concentration and strict control of large particles and fine dust content.
Black silicon carbide FEPA standard: meets the F series standard (GB/T 2481.1-1998), with a wide particle size distribution range, allowing a certain proportion of fine particles to exist.
3. Core Uses
Black Silicon Carbide P standard: Specially used for coated abrasives, such as sandpaper, sandpaper, sponge polishing blocks, nylon polishing wheels, etc., because the long particles can enhance the adhesion of the substrate and grind evenly.
Black Silicon Carbide FEPA standard: Used for bonded abrasives (such as resin grinding wheels, ceramic grinding wheels), and can also be used as sandblasting media or metallurgical deoxidizers.
4. Differences in Production Processes
Black Silicon Carbide P standard: Two acid washes are required to remove free carbon/silicon, improve hydrophilicity and bonding strength, and meet the cleanliness requirements of coated abrasives.
Black Silicon Carbide FEPA standard: The stacking density is required to be higher to improve the abrasive filling density and durability of the grinding wheel.
5. Conventional production particle sizes are different
Black silicon carbide P standard: P12 P16 P20 P24 P30 P36 P40 P50 P60 P80 P100 P120 P150 P180 P220 P240 P280 P320 P360 P400 P500 P600 P800 P1000 P1200 P1500 P2000 P2500 P3000 P4000 P5000
Black silicon carbide FEPA standard: F12 F14 F16 F20 F22 F24 F30 F36 F46 F54 F60 F70 F80 F90 F100 F150 F180 F220 F230 F240 F280 F320 F360 F400 F500 F600 F800 F1000 F1200 F1500 F2000
6. Performance characteristics comparison
| Characteristics | Black silicon carbide P standard | Black silicon carbide FEPA standard |
| Sharpness Higher | suitable for fine grinding Lower | focusing on durability |
| Stacking density Lower | ensuring particle angles Higher | extending the life of the grinding wheel |
| Impurity control | More stringent (pickling process) | A small amount of dust is allowed |
7. Typical application scenarios
Black silicon carbide P standard: dense polishing (such as electronic components, metal surface treatment) .
Black silicon carbide FEPA standard: heavy-duty grinding (such as stone cutting, metal rough processing) . From the above differences, it can be seen that the selection of black silicon carbide P sand and F sand needs to be comprehensively evaluated according to specific process requirements (such as grinding accuracy, strength, life, etc.).